project-templates-service.ts

import * as path from "path";
import * as temp from "temp";
import * as constants from "../constants";
temp.track();

export class ProjectTemplatesService implements IProjectTemplatesService {

	public constructor(private $errors: IErrors,
						private $fs: IFileSystem,
						private $logger: ILogger,
						private $npm: INodePackageManager,
						private $npmInstallationManager: INpmInstallationManager) { }

	public prepareTemplate(originalTemplateName: string, projectDir: string): IFuture<string> {
		return ((): string => {
			let realTemplatePath: string;
			if(originalTemplateName) {
				let templateName = originalTemplateName.toLowerCase();

				// support <reserved_name>@<version> syntax
				let data = templateName.split("@"),
					name = data[0],
					version = data[1];

				if(constants.RESERVED_TEMPLATE_NAMES[name]) {
					realTemplatePath = this.prepareNativeScriptTemplate(constants.RESERVED_TEMPLATE_NAMES[name], version, projectDir).wait();
				} else {
					// Use the original template name, specified by user as it may be case-sensitive.
					realTemplatePath = this.prepareNativeScriptTemplate(originalTemplateName, version, projectDir).wait();
				}
			} else {
				realTemplatePath = this.prepareNativeScriptTemplate(constants.RESERVED_TEMPLATE_NAMES["default"], null/*version*/, projectDir).wait();
			}

			if(realTemplatePath) {
				//this removes dependencies from templates so they are not copied to app folder
				this.$fs.deleteDirectory(path.join(realTemplatePath, constants.NODE_MODULES_FOLDER_NAME)).wait();
				return realTemplatePath;
			}

			this.$errors.failWithoutHelp("Unable to find the template in temp directory. " +
				`Please open an issue at https://github.com/NativeScript/nativescript-cli/issues and send the output of the same command executed with --log trace.`);
		}).future<string>()();
	}

	/**
	 * Install verified NativeScript template in the npm cache.
	 * The "special" here is that npmInstallationManager will check current CLI version and will instal best matching version of the template.
	 * For example in case CLI is version 10.12.8, npmInstallationManager will try to find latest 10.12.x version of the template.
	 * @param {string} templateName The name of the verified NativeScript template.
	 * @param {string} version The version of the template specified by user.
	 * @return {string} Path to the directory where the template is installed.
	 */
	private prepareNativeScriptTemplate(templateName: string, version?: string, projectDir?: string): IFuture<string> {
		this.$logger.trace(`Using NativeScript verified template: ${templateName} with version ${version}.`);
		return this.$npmInstallationManager.install(templateName, projectDir, {version: version, dependencyType: "save"});
	}
}
$injector.register("projectTemplatesService", ProjectTemplatesService);